Which type of glass is used for windshields?

• A. Tempered
• B. Laminated
• C. Plastic
• D. Acrylic

Answer: (B)

Windshields use laminated safety glass because it stays together when struck, keeping the glass from breaking into sharp, dangerous shards and helping prevent occupants from being cut or objects from penetrating the cabin. Laminated glass is made of two glass layers bonded to a plastic interlayer (usually PVB). If the windshield is impacted, the interlayer holds the shards in place and adds a bit of structural strength, while also providing some sound and UV protection.

Tempered glass, which is designed to crumble into small, blunt fragments, is great for side and rear windows where a break is acceptable and can reduce the chance of large, dangerous shards. But for windshields, the ability to remain in one piece during an impact is crucial, which laminated glass provides. Plastic or acrylic windshields aren’t used because they scratch easily, degrade under UV exposure, and don’t offer the necessary optical clarity and strength.